I am a beginner and I am making a small baby blanket. I have knit(ted?) 25 squares 6 x 6.5" and I now need to stitch them together. I have watched the mattress stitch videos and I really am very bad at it. Is there a certain way the blocks need to be turned? They look the same (right and wrong side). Cast on vs cast off side ?? Any advice would be appreciated. TIA!